Attention alters appearance.
D001288:Attention / Q000502:physiology*; D001921:Brain / Q000502:physiology; D015350:Contrast Sensitivity / Q000502:physiology*; D003463:Cues; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008959:Models, Neurological; D009483:Neuropsychological Tests; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology; D014795:Visual Pathways / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*